Copi C J, Olive K A, Schramm D N
Case-Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106-7079, USA.
Proc Natl Acad Sci U S A. 1998 Mar 17;95(6):2758-60. doi: 10.1073/pnas.95.6.2758.
We explore the difficulties with a primordial origin of variations of D/H in quasar absorption systems. In particular we examine options such as a very large-scale inhomogeneity in the baryon content of the universe. We show that very large-scale (much larger than 1 Mpc) isocurvature perturbations are excluded by current cosmic microwave background observations. Smaller-scale ad hoc perturbations (approximately 1 Mpc) still may lead to a large dispersion in primordial abundances but are subject to other constraints.
我们探讨了类星体吸收系统中D/H变化的原初起源所面临的困难。特别是，我们研究了诸如宇宙重子含量中存在非常大尺度的不均匀性等情况。我们表明，当前的宇宙微波背景观测排除了非常大尺度（远大于1百万秒差距）的等曲率微扰。较小尺度的特设微扰（约1百万秒差距）仍可能导致原初丰度的较大离散，但会受到其他限制。
